1
Functional Description
q
Sandwich plate design for use in vertical stacking
assemblies
q
Meter-in or meter-out control as required
q
Three possible arrangements:
- throttle valve in channel A
- throttle valve in channel B
- throttle valves in channels A and B
q
Flow adjustment - hexagon set screw with locknut
and protective cap
q
Installation dimensions to ISO 4401:1994
and DIN 24 340-A6
Double throttle valves are used to control flow rates in
two separate lines (A,B) of a hydraulic circuit. The
modular design provides six functional symbols.
The valve body (1) has drilled channels and the throttle
valve is built into channel A or B or into channels A and
B. They restrict the fluid flow in one direction while
providing reverse free-flow in the opposite direction. The
throttling spool (2) is adjusted by means of a set screw
(3) and each spool position corresponds with a certain
area of passage.
Fluid entering port A1 is throttled to port A2 via a groove
and an annulus area. Fluid returning from port B2 shifts
the valve seat (4) against the spring (5), thus creating a
passage which allows reverse free-flow to port B1
(function of a check valve).
The sandwich design enables simple stacking with
other components of the same size.
According to the valve arrangement, the meter-in or
meter-out control is provided. The orientation of the
throttle check valves in the valve body corresponds with
the symbols shown on the name plate.
The valve housing (1) is phosphate coated, the surfaces
of the other parts are zinc coated.
HA 5053
6/2012
Replaces
HA 5053 5/2008
Size 04 · p
max
up to 320 bar · Q
max
up to 25 L/min
Double Throttle Check Valves
Sandwich Plates
VSO1-04/M
2
HA 5053
Ordering Code
Technical Data
VSO1-04/M S
Nominal size
Modular design
Double Throttle Check Valve
Adjustment element
Hexagon set screw with locknut
and protective cap
Seals
no designation
V
NBR
FPM (Viton)
Nominal size mm 04
Maximum flow L/min 25
Maximum operating pressure bar 320
Hydraulic fluid Hydraulic oils of power classes (HL, HLP) to DIN 51524
Fluid temperature range for (NBR) °C -30 ... +100
Fluid temperature range for ( Viton) °C -20 ... +120
Viscosity range mm
2
/s 20 ... 400
Maximum degree of fluid contamination Class 21/18/15 to ISO 4406
Weight kg 0.8
Mounting position unrestricted
ABC
Meter-in control
EFD
Meter-out control
Functional Symbols
Functional Symbols
A
B
C
check valve in line A*
check valve in line B*
check valves in lines A and B*
E
F
D
check valve in line A*
check valve in line B*
check valves in lines A and B*
* see Functional Symbols
Notes: The orientation of the throttle check valves in the valve body corresponds with symbols shown on the name
plate.
valve side
subplate or manifold side
3
HA 5053
Dp-Q Characteristics Measured at n = 32 mm
2
/s)
Throttle valve
Pressure difference Dp related to flow from A1 to A2, (from B1 to B2)
- Throttle setting in turns (from the end stop)
Pressure difference Dp [bar]
Pressure difference Dp[bar]
Flow Q [L/min)]
Spare Parts
Flow Q [L/min]
Check valve
pressure difference Dp related to flow from A2 to A1 (from B2 to B1)
Throttle valve closed
Seal kit
Type
Dimensions, quantity
Ordering number
O-ring Square ring
Standard NBR70 - 7,65 x 1,68 (4 pcs.) 20718400
Viton 7,65 x 1,68 (4pcs.) - 28618000
4
HA 5053
Caution!
The packing foil is recyclable. The protective plate can be returned to manufacturer.
A cover plate DK 1-04/32-x with the respective channel connection can be ordered separately - see catalogue
HA 0003 - Cover plates.
Mounting bolts M6x40 DIN 912-10.9 or studs must be ordered separately. Tightening torque 5 Nm.
For applications outside these parameters, please consult the manufacturer.
The technical information regarding the product presented in this catalogue is for descriptive purposes only. It should
not be construed in any case as a guaranteed representation of the product properties in the sense of the law.
Subject to alteration without notice!
ARGO-HYTOS s.r.o. CZ - 543 15 Vrchlabí
Tel.: +420-499-403111, Fax: +420-499-403421
E-mail: sales.cz@argo-hytos.com
www.argo-hytos.com
Valve Dimensions Dimensions in millimeters
Required surface finish of
interface
Instalation Dimensions
Typ VSO1-04/MAS
Typ VSO1-04/MES
Typ VSO1-04/MBS
Typ VSO1-04/MFS
Typ VSO1-04/MCS
Typ VSO1-04/MDS
1 Name plate
2 Set screw - Inside HEX 5
Clockwise rotation = flow decrease
Counterclockwise rotation = flow increase
3 Locknut, HEX 10
4 Protective cap
5 Square ring (4 pcs.) supplied with valve
6 Closing screw
7 4 mounting holes
4 7 1 5 3 4 2
6
